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Finding the Fourth Proportional to 651,749.40, 978,498.90 and 416,136.60

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Solution

The fourth proportional to 651,749.40, 978,498.90 and 416,136.60 is: 624,763.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,749.40 : 978,498.90 = 416,136.60 : x
  2. Step 2: Convert to fraction form
    651,749.40/978,498.90 = 416,136.60/x
  3. Step 3: Cross multiply
    651,749.40x = 978,498.90 × 416,136.60
  4. Step 4: Simplify right side
    651,749.40x = 407,189,205,349.74
  5. Step 5: Solve for x
    x = 407,189,205,349.74/651,749.40
  6. Step 6: Final answer
    x = 624,763.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.